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PRELIMINARY NOTE The unaudited Condensed Consolidated Financial Statements as of and for the three-month period ended

Key Takeaway: Table of Contents unaudited Condensed Consolidated Financial Statements as of and for the three-month period ended March 31, 2019, included herein, have been prepared in accordance with International Financial Reporting Standards ( IFRS ) as issued by the International Accounti

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unaudited Condensed Consolidated Financial Statements as of and for the three-month period ended March 31, 2019, included herein, have been prepared in accordance with International Financial Reporting Standards ( IFRS ) as issued by
the International Accounting Standards Board ( IASB ). The consolidated financial statements are presented in U.S. dollars in order to enhance comparability with Cellectis peers, which primarily present their financial statements in
U.S. dollars. All references in this interim report to $, U.S. dollars, and dollars, mean U.S. dollars and all references to and euros mean euros, unless otherwise noted.
This interim report, including Management s Discussion and Analysis of Financial Condition and Results of Operations,
contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and Section 27A of the Securities Act. All statements other than present and historical facts and conditions contained in this
interim report, including statements regarding our future results of operations and financial position, business strategy, plans and our objectives for future operations, are forward-looking statements. When used in this interim report, the words
anticipate, believe, can, could, estimate, expect, intend, is designed to, may, might, plan,
potential, predict, objective, should, or the negative of these and similar expressions identify forward-looking statements. Actual results, performance or events may differ materially from those
projected in any forward-looking statement. Factors that may cause actual results to differ from those in any forward-looking statement include, without limitation, those described under Risk Factors and Special Note Regarding
Forward-Looking Statements in our Annual Report on Form 20-F filed with the Securities and Exchange Commission on March 13, 2018, as amended on April 25, 2019 (the Annual Report ).
As a result of these factors, we cannot assure you that the forward-looking statements in this interim report will prove to be accurate. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light
of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame or at
all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.
We own various trademark registrations and applications, and unregistered trademarks and service marks, including Cellectis ,
TALEN and our corporate logos, and all such trademarks and service marks appearing in this interim report are the property of Cellectis. The trademark Calyxt is owned by Calyxt. All other trade names, trademarks and service marks of other
companies appearing in this interim report are the property of their respective holders. Solely for convenience, the trademarks and trade names in this interim report may be referred to without the and symbols, but such references, or
the failure of such symbols to appear, should not be construed as any indication that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto. We do not intend to use or display other companies
trademarks and trade names to imply a relationship with, or endorsement or sponsorship of us by, any other companies.
this interim report, the terms Cellectis, we, our, us, and the Company refer to Cellectis S.A. and its subsidiaries, taken as a whole, unless the context otherwise requires. References to
Calyxt refer to Calyxt, Inc.

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PART I FINANCIAL INFORMATION 3
Item 1. Condensed Consolidated Financial Statements (Unaudited) 3
Item 2. Management s Discussion & Analysis of Financial Condition and Results of Operations 40
Item 3. Quantitative and Qualitative Disclosures About Market Risks 52
Item 4. Controls and Procedures 52
PART II OTHER INFORMATION 52
Item 1. Legal Proceedings 52
Item 1A. Risk Factors 52
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds 52
Item 3. Default Upon Senior Securities 52
Item 4. Mine Safety Disclosures 52
Item 5. Other Information 52
Item 6. Exhibits 53

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PART I FINANCIAL INFORMATION
Item 1. Condensed Consolidated Financial Statements (unaudited)
STATEMENTS OF CONSOLIDATED FINANCIAL POSITION
Notes As of
December 31, 2018 March 31, 2019*
ASSETS
Non-current assets
Intangible assets 1,268 1,222
Property, plant, and equipment 6 10,041 9,689
Right-of-use assets 5 36,788
Other non-current financial assets 1,891 4,684
Total non-current assets 13,199 52,382
Current assets
Inventories 275 1,054
Trade receivables 7.1 2,971 2,801
Subsidies receivables 7.2 17,173 19,327
Other current assets 7.3 15,333 14,534
Current financial assets 8.1 388 382
Cash and cash equivalents 8.2 451,501 421,457
Total current assets 487,641 459,555
TOTAL ASSETS 500,840 511,938
LIABILITIES
Shareholders equity
Share capital 12 2,765 2,765
Premiums related to the share capital 12 828,525 831,282
Currency translation adjustment (16,668 ) (22,385 )
Retained earnings (deficit) (326,628 ) (405,264 )
Net income (loss) (78,693 ) (15,248 )
Total shareholders equity Group Share 409,301 391,150
Non-controlling interests 40,970 41,156
Total shareholders equity 450,272 432,307
Non-current liabilities
Non-current lease debts 9 1,018 30,263
Non-current provisions 15 2,681 2,314
Total non-current liabilities 3,699 32,577
Current liabilities
Current lease debts 9 333 5,385
Trade payables 9 15,883 15,698
Deferred revenues and contract liabilities 11 20,754 20,280
Current provisions 15 1,530 1,134
Other current liabilities 10 8,369 4,557
Total current liabilities 46,869 47,054
TOTAL LIABILITIES AND SHAREHOLDERS EQUITY 500,840 511,938
The accompanying notes form an integral part of these unaudited Interim Condensed Consolidated Financial

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UNAUDITED STATEMENTS OF CONSOLIDATED OPERATIONS
For the three-month period ended March 31,
$ in thousands, except per share amounts
Notes For the three-month period ended March 31,
2018 2019*
Revenues and other income
Revenues 3.1 6,040 1,036
Other income 3.1 2,025 2,395
Total revenues and other income 8,065 3,431
Operating expenses
Cost of revenue 3.2 (579 ) (586 )
Research and development expenses 3.2 (18,395 ) (14,508 )
Selling, general and administrative expenses 3.2 (14,013 ) (11,488 )
Other operating income (expenses) 21 33
Total operating expenses (32,967 ) (26,550 )
Operating income (loss) (24,902 ) (23,119 )
Financial gain (loss) (2,137 ) 5,396
Income tax
Net income (loss) (27,038 ) (17,723 )
Attributable to shareholders of Cellectis (25,438 ) (15,248 )
Attributable to non-controlling interests (1,600 ) (2,476 )
Basic / Diluted net income (loss) per share attributable to shareholders of Cellectis 14
Basic net income (loss) per share ($ /share) (0.71 ) (0.36 )
Diluted net income (loss) per share ($ /share) (0.71 ) (0.36 )
The accompanying notes form an integral part of these unaudited Interim Condensed Consolidated Financial

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UNAUDITED INTERIM STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (LOSS)
For the three-month periods ended March 31,
For the three-month period ended March 31,
2018 2019
Net income (loss) (27,038 ) (17,723 )
Actuarial gains and losses
Other comprehensive income (loss) that will not be reclassified subsequently to income or loss
Currency translation adjustment 4,385 (5,459 )
Other comprehensive income (loss) that will be reclassified subsequently to income or loss 4,385 (5,459 )
Total Comprehensive income (loss) (22,653 ) (23,182 )
Attributable to shareholders of Cellectis (21,176 ) (20,965 )
Attributable to non-controlling interests (1,477 ) (2,217 )
The accompanying notes form an integral part of these unaudited Interim Condensed Consolidated Financial

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UNAUDITED INTERIM STATEMENTS OF CONSOLIDATED CASH FLOWS
For the three-month period ended March 31,
Notes For the three-month period ended March 31,
2018 2019*
Cash flows from operating activities
Net loss for the period (27,038 ) (17,723 )
Reconciliation of net loss and of the cash provided by (used in) operating activities
Adjustments for
Amortization and depreciation 629 1,527
Net loss (income) on disposals 20
Net financial loss (gain) 2,130 (5,396 )
Expenses related to share-based payments 12,018 5,092
Provisions 165 332
Interest (paid) / received 689 2,027
Operating cash flows before change in working capital (11,388 ) (14,142 )
Decrease (increase) in inventories 54 (788 )
Decrease (increase) in trade receivables and other current assets (3,123 ) (1,459 )
Decrease (increase) in subsidies receivables (1,826 ) (2,480 )
(Decrease) increase in trade payables and other current liabilities (77 ) (3,436 )
(Decrease) increase in deferred income (3,619 ) (94 )
Change in working capital (8,591 ) (8,256 )
Net cash flows provided by (used in) operating activities (19,979 ) (22,398 )
Cash flows from investment activities
Proceeds from disposal of property, plant and equipment 7
Acquisition of intangible assets 5 (3 )
Acquisition of property, plant and equipment (635 ) (1,812 )
Net change in non-current financial assets 76 (2,802 )
Sale (Acquisition) of current financial assets 162
Net cash flows provided by (used in) investing activities (546 ) (4,456 )
Cash flows from financing activities
Increase in share capital net of transaction costs 2,873
Shares of Calyxt issued to third parties 714 125
Payments on lease debts (26 ) (1,403 )
Treasury shares (76 )
Net cash flows provided by financing activities 3,485 (1,278 )
(Decrease) increase in cash (17,040 ) (28,131 )
Cash and cash equivalents at the beginning of the year 256,380 451,501
Effect of exchange rate changes on cash 2,022 (1,913 )
Cash and cash equivalents at the end of the period 8 241,363 421,457
The accompanying notes form an integral part of these unaudited Interim Condensed Consolidated Financial

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UNAUDITED STATEMENTS OF CHANGES IN CONSOLIDATED SHAREHOLDERS EQUITY
For the three-month period ended March 31,
$ in thousands, except share data
Share Capital Ordinary Shares Equity
Notes Number of shares Amount Premiums related to share capital Treasury shares reserve Currency translation adjustment Retained earnings (deficit) Income (Loss) attributable to shareholders of Cellectis Non controlling interests Total Shareholders Equity
As of January 1, 2018, as restated (*) 35,960,062 2,367 614,037 (297 ) 1,835 (253,702 ) (99,368 ) 264,873 19,113 283,986
Net Loss (25,438 ) (25,438 ) (1,600 ) (27,038 )
Other comprehensive income (loss) 4,262 4,262 123 4,385
Total comprehensive income (loss) 4,262 (25,438 ) (21,176 ) (1,477 ) (22,653 )
Allocation of prior period loss (99,368 ) 99,368
Transaction with subsidiaries (1) 198 198 516 714
Treasury shares (76 ) (76 ) (76 )
Exercise of share warrants, employee warrants and stock options 11 109,051 7 2,866 2,873 2,873
Non-cash stock-based compensation expense 12 8,730 8,730 3,287 12,018
Other movements (96 ) (96 ) (26 ) (122 )
As of March 31, 2018 36,069,113 2,374 625,634 (373 ) 6,097 (352,969 ) (25,438 ) 255,325 21,414 276,739
As of January 1, 2019 42,430,069 2,765 828,525 (16,668 ) (326,628 ) (78,693 ) 409,301 40,970 450,272
Net Loss (15,248 ) (15,248 ) (2,476 ) (17,723 )
Other comprehensive income (loss) (5,717 ) (5,717 ) 259 (5,459 )
Total comprehensive income (loss) (5,717 ) (15,248 ) (20,965 ) (2,217 ) (23,182 )
Allocation of prior period loss (78,693 ) 78,693
Capital Increase (1 ) 1
Transaction with subsidiaries (2) 56 56 69 125
Non-cash stock-based compensation expense 12 2,758 2,758 2,334 5,092
As of March 31, 2019 42,430,069 2,765 831,282 (22,385 ) (405,264 ) (15,248 ) 391,150 41,156 432,307
The accompanying notes form an integral part of these unaudited Interim Condensed Consolidated Financial Statements

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NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
Cellectis S.A. (hereinafter Cellectis or we ) is a limited liability company ( soci t
anonyme ) registered and domiciled in Paris, France. We are a clinical-stage biotechnological company, employing our core proprietary technologies to develop
best-in-class products in the field of immuno-oncology. Our product candidates, based on gene-edited T-cells that express
chimeric antigen receptors, or CARs, seek to harness the power of the immune system to target and eradicate cancer cells. Our gene-editing technologies allow us to create allogeneic CAR T-cells, meaning they
are derived from healthy donors rather than the patients themselves. Our gene-editing expertise also enables us to develop product candidates that feature additional safety and efficacy attributes, including control properties designed to prevent
them from attacking healthy tissues, to enable them to tolerate standard oncology treatments, and to equip them to resist mechanisms that inhibit immune-system activity. In addition to our focus on immuno-oncology, we are exploring the use of our
gene-editing technologies in other therapeutic applications, as well as to develop healthier food products for a growing population.
Cellectis, Inc., Cellectis Biologics Inc. (which was created on January 18, 2019) and Calyxt, Inc. are sometimes referred to as a consolidated group of companies as the Group.
Note 2. Accounting principles
The Interim Condensed Consolidated Financial Statements of Cellectis as of and for the three-month period ended March 31, 2019
were approved by our Board of Directors on May 7, 2019.
The Interim Condensed Consolidated Financial Statements are presented in U.S. dollars.
The Interim Condensed Consolidated Financial Statements as of and for the three-month period ended March 31, 2019 have been prepared
in accordance with IAS 34 Interim Financial Reporting, as issued by the International Accounting Standards Board ( IASB ).
Condensed Consolidated Financial Statements as of and for the three-month period ended March 31, 2019 have been prepared using the same accounting policies and methods as those applied for the year ended December 31, 2018, except as
described below related to the new or amended standards applied.
IFRS include International Financial Reporting Standards ( IFRS ),
International Accounting Standards ( the IAS ), as well as the interpretations issued by the Standards Interpretation Committee ( the SIC ), and the International Financial Reporting Interpretations Committee ( IFRIC ).
Application of new or amended standards or new amendments
The following pronouncements and related amendments have been adopted by us from January 1, 2019 but had no significant impact on the Interim Condensed
Consolidated Financial Statements:

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Standards, interpretations and amendments issued but not yet effective
The following pronouncements and related amendments are applicable for first quarter accounting periods beginning after January 1, 2020. We do not
anticipate that the adoption of these pronouncements and amendments will have a material impact on our results of operations, financial position or cash flows:
2.2 IFRS16 application
Since January 1 2019, Cellectis has applied the new standard IFRS 16 Leases .
Under this standard, a financial asset and a financial liability are recognized for Group leases that meet the standard s criteria.
The financial statements for the 2018 financial year have not been restated in accordance with the transition options of IFRS 16 elected by the Group since
Cellectis has applied the modified retrospective approach.
The Group uses the two capitalization exemptions provided by the standard:
The Group has also applied the follow practical expedients at the transition date:
The main changes introduced by IFRS 16 are the following:
Capitalization of the right-of-use assets for real-estate lease
Identified lease contracts mainly concern Cellectis Headquarters and R&D buildings in Paris and New York and the Calyxt s
Headquarters and its production and storage areas in Roseville, Minnesota, USA.
For purposes of IFRS 16, the lease term corresponds to the non-terminable period as extended, if applicable, by renewal options whose exercise by the Group are reasonably certain.
The discount rate used to calculate the lease debt has been determined, for each portfolio of assets, according to the incremental borrowing rate at the
The sale and lease-back agreement entered into by Calyxt in the third quarter of 2017 has a defined lease term and was classified as an
operating lease agreement under IAS 17. According to IFRS 16, this lease receives the standard accounting treatment for operating leases existing at the date of initial application and the value of the right-of-use asset is adjusted for the amount of deferred losses recognized in the statement of financial position immediately before the date of initial application, which was $2.1 million.

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Accounting for the other-assets leases:
The main lease contracts identified correspond to office and laboratory equipment.
The cumulative effect of initially applying IFRS 16 has been recognized as an adjustment to the balance sheet opening at the date of initial application,
January 1, 2019, as presented in the table below:
January 1, 2019 as presented IFRS 16 restatement January 1, 2019 as restated
ASSETS
Non-current assets
Intangible assets 1,268 1,268
Property, plant, and equipment 10,041 10,041
Right-of-use assets 36,595 36,595
Other non-current financial assets 1,891 1,891
Total non-current assets 13,199 36,595 49,794
Current assets
Inventories 275 275
Trade receivables 2,971 2,971
Subsidies receivables 17,173 17,173
Other current assets 15,333 (2,139 ) 13,194
Current financial assets 388 388
Cash and cash equivalents 451,501 451,501
Total current assets 487,641 (2,139 ) 485,502
TOTAL ASSETS 500,840 34,455 535,295
LIABILITIES
Shareholders equity
Share capital 2,765 2,765
Premiums related to the share capital 828,525 828,525
Treasury share reserve
Currency translation adjustment (16,668 ) (16,668 )
Retained earnings (deficit) (326,628 ) (326,628 )
Net income (loss) (78,693 ) (78,693 )
Total shareholders equity Group Share 409,301 409,301
Non-controlling interests 40,970 40,970
Total shareholders equity 450,272 450,272
Non-current liabilities
Non-current lease debts 1,018 30,421 31,439
Non-current provisions 2,681 (639 ) 2,042
Total non-current liabilities 3,699 29,782 33,481
Current liabilities
Current lease debts 333 5,077 5,409
Trade payables 15,883 15,883
Deferred revenues and contract liabilities 20,754 20,754
Current provisions 1,530 (403 ) 1,127
Other current liabilities 8,369 8,369
Total current liabilities 46,869 4,673 51,542
TOTAL LIABILITIES AND SHAREHOLDERS EQUITY 500,840 34,455 535,295

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Last updated: May 8, 2019